| 摘要 |
PROBLEM TO BE SOLVED: To provide a collimator device which has a simple structure, can immediately display the measured value of the out-of-focus amount of a lens to be inspected by only placing the lens without requiring the manual operation of a measuring instrument by a worker, and can maintain high resolution accuracy and from which reading errors are eliminated by displaying the shifting amount of the focal point after converting the amount into an electric signal even when the lens to be inspected is not operated. SOLUTION: The illuminating light from a light source section consisting of a reflecting mirror 1 and a light source 2 irradiates a chart 6 through a diffusing plate 3 and a condenser lens 4. A collimator lens 7 is focused on the chart 6 so that the light emitted from the lens 7 may be emitted as if the chart 6 exists at an infinite point. The light is made incident to a lens 8 to be inspected and an AF sensor unit 9 is set up at the image forming position of the light and irradiated with the light. The sensor unit 9 finds the out-of-focus amount of the lens 8. |
